Where are the replies to my comments on other blogs?

Suddenly - for the past few days - I am no longer seeing other bloggers' replies to the comments I have left on their blogs. They pop up as a notification on my iPad, but then when I try to look on the dashboard via the little orange speech bubble, or in the WP app under notifications, they're not there.

Comments to my own blog are FINE. They come by email and they're in the notifications list and in the comments list in the app and on the dashboard.

Ditto. Exactly the same problem today, both at PC and iPad. It is imperitive that I be notified of responses to my comments as they can raise further questions which a blogger will think I ignore. A fix please?